diff --git a/agenda b/agenda
index a27ea20..6458fa7 100644
--- a/agenda
+++ b/agenda
@@ -140,12 +140,12 @@ __edit() {
 
 	local base ext slug file
 	if [ "$opt_b" = "yes" ]; then
-		base="0000-$(___slugify "$*")"
+		base="0000-$(__slugify "$*")"
 	else
 		base=$(date -d "$*" +%F)
 	fi
 	ext=$opt_e
-	slug=$(___slugify "$opt_t")
+	slug=$(__slugify "$opt_t")
 	file="$AGENDA_DIR/$slug/$base.$ext"
 
 	# Existing files may overwrite the `-e` option.
@@ -234,7 +234,7 @@ __list() {
 	date=$(date -d "$*" +%F)
 	until=$(date -d "$opt_u" +%F)
 	if [ -n "$opt_t" ]; then
-		slug=$(slugify "$opt_t")
+		slug=$(__slugify "$opt_t")
 		dir="$AGENDA_DIR/$slug"
 	else
 		dir="$AGENDA_DIR"
@@ -323,7 +323,7 @@ __agenda_create() {
 }
 
 # https://stackoverflow.com/a/49035906
-___slugify() {
+__slugify() {
     echo "$1" \
         | iconv -c -t ascii//TRANSLIT \
         | sed -E "s/[~^]+//g" \